Syncope and the Brugada Syndrome

Infra-Hisian Conduction Disturbance and Alternating Left Anterior/Posterior Fascicular Block

“…A literature search reveals only 3 cases of this phenomenon since it was first described by Rosenbaum et al 1 in 1967. 6 , 7 , 8 EP hypotheses offered in some of the literature refer to impaired conduction and differences in refractoriness in both fascicles. This phenomenon is often accompanied by a prolonged PR interval, which can allow recovery of 1 of the fascicles.…”